Process for dry distillation of vinasses under reduced pressure



Patented a as, iaec I G E GUILLISSEN, OF ANDERLECT-IBRUSSELS, BELGIUM; ASSIGNOR, BY MESNE A.S-

SIGNMENTS, T L'umoN GHIMIQUE BELen "sooIETE ANONYME, or BRUSSELS,

BELGIUM, A. COMPANY OF BELGIUM L 'rnoonss non DRY meantime or vnia ssns "uivmm REDUCED ranssrmn No Drawing. Application filed November 8. ieaa'serial No. 673,549, and in Belgium December 15, 1922.

This invention relates to the production of nitrogenous combinations utilizableindustrially and of acetone and acetonic oils.

T The processwhichforms' the subject of the 15,v lime or other alkaline substance.

By vinasses I mean the residual liquid or liquids remaining from the fermentation and distillation of beet-sugar molasses.

The improved process provides:

1. A yield of nitrogen considerably higher than those of the previously known processes,

reaching possibly 7 to 85 per cent of the theoretical guantity and in a. form which can readily be utilized.

2. A series of by-products not hitherto recovered industrially, such as acetone and nonnitrogenous tarry oil.

3. A considerable economy resulting from the. fact that owing to the use of vacuum and 0 the addition of'lime, the temperature of distillation is materially lowered, which fact reduces the consumption of fuel and allows of employing apparatus of simple'construction adapted todast a long time.

f In the following description there are given two examples of the results obtained by treating according to the process indicated above firstly a de-sugared molasses, and

secondly a molasses-distillery vinasse.

40 First emampZe.A molasses of 35 Beaum desugared by means of strontium hydroxide and containing 2.1 per cent of total nitrogen, received an addition of lime amounting to from 50 to 100 per cent by weight of the desugared molasses treated and was then submitted to pyrogenous distillation at from Q to 7 00 C. under an absolute pressure of about millimetres of mercury.

The distillate contained'a total quantity of combined and volatile nitrogen corresponding to 1.63 per. cent of the molasses treated;

namely 1.04 per cent in the form of ammonia and 0.59 per centQin the formiof trimethylamine slightly mixed with higher amines.

There were also collected:

L'vola-tile liquid distilling at 50 to 80 centigrade and containing mainly acetone mixed with'a small quantity of aldehydes. This liquid represented about 1 per cent of the molasses treated.

2. A tar of less density than water, containing no nitrogen and representing about 10 per cent of the molasses treated.v

3. In the residue of the distillation:

(a) Very light carbon, possessing an intense decolourizing power after suitable washing. This carbon represented about 7 per cent of the weight of the molasses treated.

, (b) By lixiviation with water, it was easy to extract from the mineral residue a saline substance much cleaner than the salines derived from the ordinary calcination of vinasses and representing .13 per cent of the molasses treated.

Second ewampZe.--A molasses distilleryvinasse of 35 Beaum, containing 2.60 per cent of total nitrogen was subjected to the same treatment.

The nitrogen yield of the-operation was about 2 per cent, in the form of ammonia and trimethylamine. The other products arecomparable qualitatively and quantitatively with those of the preceding example.

It is obvious that the invention is in no way connected with the construction of the apparatus, the latter being constructed and arranged as deemed suitable with a view to obtaining the results set out above by'the application of the process forming the subject of the invention.

Having now particularly described and ascertained thenature of my said invention and in What manner the same is to be perfOI'II18d, I declare that what I claim is 5 In the process of producing ammonia and amines utilizable commercially and acetone, subjecting vinasses to pyrogenous distillation under a pressure of approximately 60 m/m of mercur and in the presence of such an 10 amount 0 lime as\ is required to produce acetone. In testimony whereof, Ihave signed my name to this specification at Brussels, Belgium this 24th day of October, 1923. 15 JOSEPH GUILLISSEN. 

